42045943 has 2 divisors, whose sum is σ = 42045944. Its totient is φ = 42045942.

The previous prime is 42045901. The next prime is 42045953. The reversal of 42045943 is 34954024.

It is a happy number.

42045943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42045943 is a prime.

It is a super-2 number, since 2×42045943² = 3535722645518498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42045953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21022971 + 21022972.

It is an arithmetic number, because the mean of its divisors is an integer number (21022972).

Almost surely, 2^42045943 is an apocalyptic number.

42045943 is a deficient number, since it is larger than the sum of its proper divisors (1).

42045943 is an equidigital number, since it uses as much as digits as its factorization.

42045943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 42045943 is about 6484.2843090043. The cubic root of 42045943 is about 347.7293636132.

Adding to 42045943 its reverse (34954024), we get a palindrome (76999967).

The spelling of 42045943 in words is "forty-two million, forty-five thousand, nine hundred forty-three".